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Finding the Fourth Proportional to 21,385,363.20, 30,015,091.20 and 21,385,363.20

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Solution

The fourth proportional to 21,385,363.20, 30,015,091.20 and 21,385,363.20 is: 30,015,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385,363.20 : 30,015,091.20 = 21,385,363.20 : x
  2. Step 2: Convert to fraction form
    21,385,363.20/30,015,091.20 = 21,385,363.20/x
  3. Step 3: Cross multiply
    21,385,363.20x = 30,015,091.20 × 21,385,363.20
  4. Step 4: Simplify right side
    21,385,363.20x = 641,883,626,793,123.75
  5. Step 5: Solve for x
    x = 641,883,626,793,123.75/21,385,363.20
  6. Step 6: Final answer
    x = 30,015,091.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.